Locking Device With Quick Release Mechanism

Abstract

A locking device includes an outer ring in which a clutch disc and a locking disc are respectively connected at two opposite sides thereof A first pad is located on clutch disc and a second pad is located on the first pad. A plurality of balls are located between adjacent first and second protrusions of the first and second pads. A plurality of springs are biased between the far first and second protrusions. A screw bolt connected with a grinding wheel is threadedly extended through the locking disc. When the outer ring is rotated in first direction, the balls do not fall into the recesses defined in the locking disc so as to push the clutch disc to lock the grinding wheel. When the outer ring is rotated in second direction, the balls fall into the recesses and the clutch disc is loosened from the grinding wheel.

1 . A locking device comprising
 an outer ring having an interior enclosed by a wall thereof;   a clutch disc received in the interior and located at a first side of the outer ring;   a first pad received in the interior and located on the clutch disc, the first pad including a plurality of first protrusions;   a second pad received in the interior and located on the first pad, the second pad including a plurality of second protrusions;   a plurality of balls received in the interior and located between the adjacent first and second protrusions;   a plurality of springs received in the interior and each being biased between the far first and second protrusions, and   a locking disc received in the interior and located at a second side of the outer ring, a tubular portion extending from a center of the locking disc and through the second pad, the first pad and the clutch disc, the tubular portion securely connected to the second pad, the balls located in a space between the clutch disc, the locking disc, an inner periphery of the outer ring, the first pad and the second pad, the locking disc including a plurality of recesses into which the balls fall.   
   
   
       2 . The locking device as claimed in  claim 1 , wherein the second pad includes a central hole, and two first flat surfaces are defined in an inner periphery of the central hole, the tubular portion of the locking disc includes two second flat surfaces which are matched with the first flat surfaces. 
   
   
       3 . The locking device as claimed in  claim 1 , wherein the tubular portion of the locking disc includes a screw hole defined therethrough so as to be connected with a screw bolt. 
   
   
       4 . The locking device as claimed in  claim 1 , wherein a first O-ring is located between the inner periphery of the outer ring and the clutch disc. 
   
   
       5 . The locking device as claimed in  claim 1 , wherein a second O-ring is located between the inner periphery of the outer ring and the locking disc.